I love my Scar 16 (forget what I paid for it - too much, but cheaper than today's prices) but I don't understand the 15P.
If I wanted a 5.56 Scar SBR, I'd rather start with a 16 and go with a 10.5" barrel.
If I wanted a truck gun, I'd go with something much cheaper.
If I wanted a 7" barreled SCAR, I'd go with .300 Blk (not yet available in the 15P)
So if all the stars align - once the .300 Blk version is out, if I saw one for a decent price, had some cash burning a hole in my pocket, etc. - MAYBE, but probably still not. So I'll vote for "soft pass"